Flexitol Heel Balm 56gThe Science Behind Healthy Feet Our feet are important but they are easily forgotten about when it comes to looking after them. Flexitol Rescue Heel Balm is clinically proven to quickly and effectively treat and repair dry cracked skin leaving feet and heels that look and feel smooth and healthy. Our unique formulation of 25% urea combined with other skin nourishing ingredients has been designed to deeply penetrate the skin for intense hydration.